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Study of specific drug interactions yielded the following results: Aspirin: Aspirin does not modify the Clopidogrel-mediated inhibition of ADP-induced platelet aggregation. Clopidogrel potentiates the effect of aspirin on collagen-induced platelet aggregation.
Heparin: Clopidogrel does not necessitate modification of the heparin dose or alter the effect of heparin on coagulation. Co-administration of heparin has no effect on inhibition of platelet aggregation induced by Clopidogrel.
Nonsteroidal Anti-inflammatory Drugs (NSAIDs): Concomitant administration of Clopidogrel is associated with increased occult gastrointestinal blood loss. NSAIDs and Clopidogrel should be co-administered with caution.
Warfarin: The safety of the co-administration of Clopidogrel with warfarin has not been established. Consequently, concomitant administration of these two agents should be undertaken with caution.
